Arindam Sahoo — Software Engineer

About

I'm a software engineer from Kolkata, India — B.Tech CSE (AI/ML) graduate from Narula Institute of Technology. I've been writing code since 2010, and serious backend engineering since university.

At Juspay, I worked on Hyperswitch — an open-source payment orchestration platform — handling webhooks, settlement reconciliation, payment analytics at scale, and CI/CD automation across connectors like Stripe, Braintree, and Worldpay.

I think carefully about architecture before writing a line of code, read other people's code slowly and seriously, and get unreasonably interested in edge cases most people skip over.

I'm actively looking for SDE roles — backend or fullstack — in Kolkata, remote, or hybrid.

LocationKolkata, India

StatusOpen to work

DegreeB.Tech CSE (AI/ML) — 2025

CGPA8.24 / 10

Emailarindams2002@gmail.com

Experience

Where I've worked.

Juspay

Nov 2024 — Aug 2025

Quality Engineer Intern — Backend Automation & DevOps

—Owned end-to-end QA for 30+ connectors including Stripe, Braintree, Authorize.net, JPMorgan, Paystack, WorldpayXML, Recurly, Chargebee, and more
—Validated complex payment flows: external 3DS, wallets, incremental auth, and retries — tested 200+ PRs across v2 Payments, Refunds, Method Sessions, User Auth, API Key routing, and multi-tenant email logic
—Led settlement reconciliation and USA/Europe payment analytics for the Recon team — processed raw transaction data at scale in Python to surface discrepancies between gateway records and internal ledgers
—Owned daily integration and sandbox deployments (v1 & v2), database migration tracking, and complete v2 verifications
—Designed a rule-based routing system to automate pre-deployment sanity — reduced manual QA cycles that had run entirely by hand for two years
—Built Jenkins CI/CD pipelines and internal CLI automation tools that collapsed multi-step engineering workflows to a single command
—Coordinated production releases end-to-end with founding engineers, ensuring zero-regression deployments across payment-critical services

Webhooks Jenkins GitHub Actions Python Cypress Newman Reconciliation CI/CD Grafana 30+ Connectors

GUVI GEEK NETWORKS

Aug 2023 — Present

Technical Translator

Translating technical programming content — Python, DSA, web development — for GUVI's vernacular learning platform, part of HCL & IIT Madras Research Park.

Technical WritingPythonDSA

Codevidhya

Nov 2021 — Present

Coding Instructor

Teaching Python, web development, and foundational CS to K–12 students. Also worked as Content Developer and Content Reviewer, building and auditing curriculum.

PythonCurriculum DesignContent Review

Tutor-ology

Feb 2024 — Present

Coding Instructor

One-on-one and group instruction in Python and programming fundamentals.

PythonTeaching

Constellations

Apr 2024 — Nov 2024

Course Development Consultant

Developed curriculum and course content for programming and computer science topics — covering DSA, Algorithms, C++, Python, Java, and C. Designed learning objectives, assessment strategies, and structured learning paths.

DSAAlgorithmsC++PythonJavaCurriculum Development

Projects

What I've built.

⬡ Stealth Mode · Flagship Project

Korner

A super platform which brings merchants with products and individuals or agencies with services on the same page which includes artists or one-person businesses.

Small and home-based sellers rely on WhatsApp and Instagram DMs to sell — scattered conversations, no catalog, no order tracking. Korner gives them lightweight, shareable storefront pages they can drop anywhere (WhatsApp, Insta bio, Facebook groups) without building a full website.

Multi-tenant architecture — Organizations own multiple Merchants, each scoped with role-based access (Admin/Monitor). Merchants get catalog management, social auto-posting, customer analytics, and a full checkout flow. Planned: WhatsApp-native ordering and UPI-based payments natively integrated.

Payments infrastructure:

—Full Razorpay integration — server-side order creation, HMAC signature verification, webhook-based finalization independent of frontend callback
—Redis-first checkout with 15-min inventory TTL — prevents orphan DB records on cart abandonment, enables safe payment retries
—Thread-safe inventory deduction preventing race conditions under concurrent orders
—Webhook handler robust to mid-payment browser tab closures — finalization never depends on frontend callback
—CI/CD pipelines blocking PRs on regressions across 3 test suites (Server, Client, Dashboard) via Playwright E2E

Django REST Framework React Razorpay Redis PostgreSQL HMAC / Webhooks Playwright GitHub Actions RBAC Multi-tenant

Repo private — details on request

⬡ Stealth Mode · Planning Stage

VoidBoard

Anonymous, location-native social platform with rotating handles. GeoDjango and PostGIS power geographic room boundaries — Ghost Rooms, Broadcast Rooms, and Exclusive Invites. Real-world FPS extension uses PostGIS line-of-sight queries.

DjangoPostGISGeoDjango PostgreSQLRedisWebSockets

Repo private — details on request

Payment Orchestrator

Hyperswitch

Ex-Employee · Contributor

Slack bot for CI status reporting, automated changelog generation from Git history, Jenkins pipeline improvements, and Newman + Cypress E2E suites. Shipped as GitHub Actions workflows.

GitHub ActionsJenkins Slack APICypressNewmanPython

Monitoring Dashboard for Trading

Signalyze

Local-first NSE stock signal dashboard. Aggregates RSI, MACD, Bollinger Bands, SuperTrend, and VWAP into unified buy/sell signals across a configurable watchlist. Flask backend serves real-time yfinance data with a discovery engine for scanning signals at scale. One-click Windows launcher.

Flask Python yfinance RSI / MACD Bollinger Bands SuperTrend VWAP

Web Application

DataPilot

Sandboxed SQL execution environment. Dual-database architecture — PostgreSQL for metadata, per-user SQLite instances for fully isolated execution so destructive queries never reach the production DB. Monaco-based SQL editor with syntax highlighting, query history, and timeout protection.

DjangoPostgreSQLSQLite ReactMonaco Editor

GitHub →

Web Application

Boooker

Event discovery and ticketing platform inspired by BookMyShow and District. Browse local events, check venue details, and book tickets with a clean, minimal flow — focused on reducing friction from discovery to confirmation.

Django React PostgreSQL REST API

GitHub →

Web Application

COMMS

Free, topic-based text chat platform where anyone can join public rooms and instantly start conversations — no login, no gatekeeping, no permissions required. Open, lightweight communication spaces where people drop in, share, discuss, and connect in real time around shared interests.

Django WebSockets Redis React PostgreSQL

GitHub →

Arindam
Sahoo.

Where I've worked.

What I've built.

Awards & Olympiads.

Credentials.

My Stack Bag.

Let's build something
together.

ArindamSahoo.

Where I've worked.

What I've built.

Awards & Olympiads.

Credentials.

My Stack Bag.

Let's build somethingtogether.

Arindam
Sahoo.

Let's build something
together.